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http://dx.doi.org/10.4283/JMAG.2002.7.4.156

Transition Phase Diagram for Escape Rate of Nanospin System in an Applied Magnetic Field  

Yoon, Dal-Ho (Department of Physics, Chongju University)
Publication Information
Abstract
We have investigated the escape rate of nano-magnetic particle with a magnetic field applied along the easy axis. The model studied here is described by the Hamiltonian H=$K_1\hat{S}{_z^2}$$K_2\hat{S}{_y^2}$$g{\mu}_bB$ $\hat{S}_x(K_1>K_2>0)$ and the escape rate was calculated with in the semiclassical approximation. We have obtained a diagram for orders of the phase transition depending on the anisotropy constant and the external field. For $K_2$/$K_1>$0.85 the present model reveals the existence of the first order transition within the quantum regime.
Keywords
escape rate; quantum tunneling; phase diagram; Euclidean potential;
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  • Reference
1 /
[ E. Manouskis ] / Rev. Mod. Phys.   DOI
2 /
[ A. I. Larkin;Yu. N. Ovchinnikov ] / Pis'ma Zh. Eksp. Teor. Fiz.
3 /
[] / JETP
4 /
[ R. P. Feynman ] / Statistical Mechanics
5 /
[ J. S. Langer ] / Ann. Phys.   DOI   ScienceOn
6 /
[ C. Callan;S. Coleman ] / Phys. Rev. D   DOI
7 /
[ E. M. Chudnovsky;D. A. Garanin ] / Phys. Rev. Lett.   DOI   ScienceOn
8 /
[ M. Enz;R. Schilling ] / L. Phys. C   ScienceOn
9 /
[ J. -Q. Liang;H. J. W. M<TEX>$\"{u}$</TEX>ller-Kirsten;D. K. Park;F. Zimmerschied ] / Phys. Rev. Lett.   DOI   ScienceOn
10 /
[ I. Ya. Korenblit;E. F. Shender ] / Zh. Eksp, Teor. Fiz.
11 /
[ E. M. Chudnovsky ] / Phys. Rev. A   DOI   ScienceOn
12 /
[ S. Y. Lee;J. -Q. Liang;H. J. W. M<TEX>$\"{u}$</TEX>ller-Kirsten;D. K. Park;F. Zimmerschied ] / Phys. Rev. B   DOI
13 /
[ L. Gunther;B. Barbara(eds.) ] / Proc. Meeting on Quantum Tunneling of Magnetization QTM'94, NATO ASI series
14 /
[ P. C. E. Stamp;E. M. Chudnovsky;B. Barbara ] / Int. J. Mod. Phys.   DOI
15 /
[ W. F. Brown ] / Phys. Rev.   DOI
16 /
[ E. M. Chudnovsky;L. Gunther ] / Phys. Rev. Lett.   DOI   ScienceOn
17 /
[ I. Affleck ] / Phys. Rev. Lett.   DOI
18 /
[ L. N<TEX>$\'{e}$</TEX>el ] / Ann. Geophys
19 /
[] / JEPT